Concrete column.



No. 780,320. PATENTED JAN. 17, 1905. S. B.'BURKHOLDER 6: 0. G. GEYER.

l, autom; 5.5.I3Urlholda/r M attorney CONCRETE COLUMN.

APPLIUATION FILED JULY 27,1904.

UNiTED STATES Patented January 17, 1905.

PATENT OEEICE.

SAMUELiB. BURKHOLDER, OF WEST LEIPSIC, AND CHARLES G. GEYER, OF LEIPSIC,OHIO.

CONCRETE COLUMN.

SPECIFICATION forming part of Letters Patent No. 780,320, dated January17, 1905.

Applcatiou'iiled July 27, 1904. Serial No. 218,417.

To all whom t may concern.:

Be it known that we, SAMUEL B. BURKHoL- DER, residing at West Leipsic,and CHARLES Cr. GEYER., residing at Leipsic, in the county of Putnam andState of Ohio, citizens of the United States, have invented certain newand useful Improvements in Concrete Columns, of which the following is aspecification.

This invention relates to plastic bodies of IO the concrete and metaltype, and has in view an improved concrete column possessing spe cialutility as a fence-post and also as a structural column or pole fortelephone and telegraph wires.

To this end the invention contemplates a concrete column of athoroughly-trussed formation and which is practically indestructibleunder Weather or other conditions. In this connection the invention notonly includes a concrete body-filling, but also an interior skeletontrussing-frame maintained under a stretching tension and so constructedas to provide a maximum strength for the concrete body throughout everyportion thereof not only at its sides, but also at the extremities ofthe same.

With these and other objects in view, which will more readily appear asthe nature of the invention is better understood, the same consists inthe novel construction, combination, and arrangement of parts, whichwill be hereinafter more fully described, illustrated, and claimed. Theessential feature of the invention involved in the peculiar constructionof the interior trussing core-frame is necessarily susceptible tostructural modification without departing from the scope of theinvention; but a preferred embodiment thereof is shown 40 in theaccompanying' drawings, in which- Figure 1 is a perspective view of aconcrete and metal column constructed in accordance with the presentinvention, said view eXposing the skeleton core-frame in full lines andthe concrete body in outline. Fig. 2 is an elevation of a fence-postembodying the present invention, showing the core-frame 1n dot- Figs. 3and 4 are cross-sectional ted lines.

views on the lines 3 3 and 4 4 of Fig. 2, respectively.

Like reference-numerals designate corresponding parts in the severalfigures of the drawings.

In carrying out the invention the concrete and metal column, post, orp'ole constituting the same is designed to be constructed within asuitable mold or molding apparatus; but as the latter forms thesubjcct-matter of a companion application filed of even date herewiththe description herein will be restricted to the structural elements ofthe column forming the novel features of the invention.

In the construction of the concrete and metal column there is iirstbuilt up within or upon a suitable form or mold a skeleton coreframe,(designated in its entirety by the numeral l.) This skeleton core-frameI is formed from a single wire or a plurality of wires woven into atrussed framework of the general form and construction plainlyillustrated in Fig. l of the drawings. Referring particularly to thisligure of the drawings, it will be observed that the wire skeletoncore-frame lis of an oblong rectangular form and the wire lengths are soarranged as to provide well-defined reinforced corner-strands 2, eX-tending the full length of the frame. Also the wire lengths are sodisposed as to provide the trussed frame side portions 3, formed bydiagonally lacing and crossing strands or portions 4 of the wire orwires continuously back and forth from said longitudinal cornerstrands2, thus eifecting a binding together of all of the corner-strands, whileat the same time providing a network of diagonal trussing upon all ofthe sides of the core-frame throughout the full extent thereof.

At what may be termed the bottom or lower end of the core-frame l thewire or wires constituting the same are converged downwardly andinwardly, as indicated at 5, and at the lower end of thedownwardly-convergent sections 5 there is provided a hori* Zontalrectangular wire base 6. From the corners of this bottom horizontal wirebase 6 the wire or wires are looped downwardly to form the terminaloutwardly-divergent pendent strengthening-spurs 7, which are of specialutility in a fence-post structure by extending ally strong reinforcementof the said post or column at the base thereof. In any adaptation of theinvention this bottom formation of the core-frame provides for impartingeX- ceptional strength to the base of the column.

At the Lipper end of the wire core-frame l the Wire lengths forming thelongitudinal corner-strands 2 are separated, as at 8, and passedlaterally across the corrugated top holdingsurface 9 of a metalcap-plate 10, which is arranged horizontally within the upper endportions of the body of the column. These separate wire lengths 8 at thetop corners of the core-frame cross each other at or near the corners ofthe cap-plate and are held spaced in this crossing relation by theretaining-studs 1l, projected upwardly from the corner portions of theplate 9 and engaged by the wire lengths 8 at their points ofintersection.

Through the medium of suitable tension or stretching appliances the wirecore-trame l after being shaped into the form described is placed undera stretching tension and while under that tension is iilled andenveloped with a plastic body-filling 12, which is given the desiredexterior coniiguration according to the use of the column as afence-post, as a telephone or telegraph pole, or simply as a co1- umnfor structural purposes. In any form the trussed side portions and thecorner- A strands of the stretched core-frame lie a short about thecap-plate and core-frame while the latter remains under a stretchingtension, so that this tension is maintained by the capplat-e in thecompleted hardened column, thus securing a maximum binding" and trussingeffect.

From the `foregoing it is thought that the construction, operation, andmany advantages of the herein-described concrete column will be readilyapparent without further description, and it will be understood thatchanges in the form, proportion, and minor details of construction maybe resorted to without departing from the spirit of the invention orsacrificing any of the advantages thereof.

Having thus described the invention, what is claimed, and desired to besecured by Letters Patent, is-

l. A concrete and metal column comprising a trussed core-frame under astretching tension and provided with a base, side portions and atopportion, and means, cooperating with the body-illing, for maintainingsaid frame under the stretching tension.

2. A concrete and metal column comprising a skeleton wire core-frameLinder a stretching tension and provided with trussed side portions, acap member at the top and base strengthening-spurs at the bottom, and aconcrete body filling and enveloping said frame.

3. A concrete and metal colu mn comprising a skeleton core-frameconsisting of a cap-plate,

and a wire body portion strung at the top across and over the cap-plateand having a network of diagonal trussing, and a concrete body fillingand enveloping said frame.

41 A concrete and metal column comprising a skeleton core-frameconsisting of a cap-plate Yhaving a plurality of upstandingretainingstuds and a wire body portion having cornerstrands crossingover the cap-plate at one side or said,retaining-studs, trussed sideportions,

Aand a bottom portion including a horizontal wire base, andoutwardly-divergent pendent strengthening-spurs projected from thecorners of said wire base, and a concrete body filling and envelopingthe core-frame.

In testimony whereof we aiix our signatures in presence of twowitnesses.

SAMUEL B. BURKHOLDERi CHARLES G. GEYER. Witnesses:

THOMAS C. SLAYBAUGH, JOSEPH W. ARMSTRONG.

